Centrifugal pump.



. f ab,

J. G. PFADT.l CENTRIFUGAL PUMP. ',APPLIOATION FILED JAN. 2s, 190s.

. 907,869. l Patented 1m29, 1908.4

nl f x l Il *y INveNToR ATTQRNEY WITNEs'sEs panion UNITED sralEsV PATENT OFFICE.

.ronN e. PEADT, or ERIE, PENNSYLVANIA, AssreNon rro .'riz'rEl ERIE-.PUMP AND ENeINE CQMPANY, or ERIE, PENNSYLVANIA,

A Gemona-rios or PENNSYLVANM CENTRIFUGALPUMP.- 5

To all whom it may concern:

Be it known that I, JOHN G. PFADT, a citi` zen of the United States, residing at Erie. the county of Erie and State of Pennsylva-` ments in Centrifugal Pumps,'. .of which the liquid 1sv impelled outwardly and laterally,

and then conveyed to a discharge opening so that the,

near the center-of the pum pumps may be arranged in mu tiple if desired.

The invention isillustrated in theaccompanying drawings as follows: Figure 1 shows a side elevation. ofthe discharge shell. Fig.

2 a central vertical section of the pump. Fig. 3 an elevation of the impeller, the view being from the discharge side of the same. l

A1 marks the intake and 2 the'discharge.

Either .of these may be connected with a com` pump. The impeller 'shell 3- is conand the disc'sharge shell 4 is provided with passages leading from *its` eriphery near the center. It is connected nected. 'with the intake,

wit the discharge 2 and is secured to the impellershell by means of bolts 5a. rIhe im? eller ,5 is made upV- of two-walls 6 and 7. all 7 isl rovided with a hub which is se- 'I cured to t e driving shaft 8 in any suitable manner. Wall G has an opening 9vwhch leads to the intake. connected by the impeller blades 10. The impeller blades 10 extend outwardlyfrom the opening 9 between the walls 6 and 7, the faces of the vblades lying in 'Iplanes parallel to he outer ends of the blades, however, are turned or deiiected so as to face laterally. The o ening formed between thewalls 6 and-7 is a s arranged in the side of the impeller, so that the li uid as l it is driven outwardly is forced late-ra ly by the curved wall at the ou'terperiphery of the wall 6, and also by the deected ends of the im eller blades. The liquid thus driven and de ected is received in 'the passage. 12 formed 1n the discharge. shell between the'walls 13A and 14.- Deflector blades 15- are arranged between these walls and extend outwarfdlv andlaterally tothe vface of the piarssage' which Specification ofLetbers Patent. Application filed January 23, 19t-)8. `Serial No. .412,369. l

The walls '6 and 7 'are Patented. Dec. 29, 1908.

dischargefshell and the deflector blades are stationary, or at least do not rotate with the impeller. The passage 12 vterminates in the discharge opening 2.

It will bennoted that the liquid discharged from Y the vimpeller willhave a very rapid' well as movement :in a lateral direction. -The stationary. deflectors are preferably inniomentum `il'rcident to the vcircumfereirtial movement is utilized to carry the li uid toward thedischarge at the center. `he deiiectors therefore, not only make useful the momentum in this way, but also by retarding vthe circumferential movement of the liquid absorb the centrifugal force incident to a rotative movement thereof, so that the Aliquid driven by the im eller. is relieved to a very large extent of bac pressure in the discharge passage.

im' eller b ades are carried between rotating wals. In this way the friction incident to stationary walls is obviated, and the deiiected or turned ends of the blades assist in the deilectionof the liquid from a movement in a radial direction to amovement in the 'lateral direction to; carry it into the dischar e passage.; -v W atIclaimasnewis:

- 1. In a centrifugal pump, the combination of an impeller 'shellshaving an intake near its axis and a discharge near its periphthe, shell, comprising outwardly extending impeller blades having their outer ends rturned to face in an axiall direction to drive an actuated li uid in an axial direction at the or receiving the deflected li uid at the periphery, and for conveying tbe liquid toward the-axis of the pump; and a-deflector stationary with relation to the impeller arranged in the discharge shell.

2. Ina centrifugal pump, the combinationof an impeller shell having an intake near its axis and a discharge near its periphery; an impeller rotatively ,mounted in fsaid shell, vand comprising lan inner wall 6 'and outer wall 7 o en to the intake, and vhaving' alaterally deg `charge opening from the impeller on one side ectly opporthereof; impeller blades arranged between site the discharge from the irnpeller 5. TheA clined from a true radialdi-ne, so that the j In the preferred constructionnshown, the

ery; an impeller rotatively 'mounted m movement in a circumferential direction, as

vso

- eriphery; a lscharge shell having a passage ectededge forming a dishaving a passage communicating with a dising a laterally de charge of the impeller, and extending toward the axis of the pum and defiector blades' inthe discharge lsh lwhich are stationary with relation to said impeller.

3. In a centrifugal pump, the combination of an impeller shell having an intake near its axis and a discharge near its periphery; an impeller rotatively mounted in said shell, and comprising an inner wall 6 and outer Wall 7 o en vto the intake and havected edge forming a discharge openin for .the impeller on one side thereof; impe er blades arranged between said Walls, and having their outer ends turned tofface 'in an axial direction, to deiiect the liquid in an axial direction.

4. In a centrifugal pump, the combination of an impeller shell 3; the intake 1 secured thereto; the driving shaft 8; the impeller mounted on the shaft, and comprising the inner wall 7 secured to the shaft, the outer wall 6 having an opening 9 leading from the 1 intake, and its outer periphery deilected to form a discharge in the side of the deiiector; the deiiector blades 10 arranged between the walls and having the turned ends 11 facing in an axial direction at their extremities; the discharge shell 4 formed of the walls 13 and 14 with the intervening passage 12 leading from the discharge of the impeller or the axis of the ump; and stationary deilector blades l5 inc ined from a true radial line to deflect the liquid toward the center.

In testimony whereof I have hereunto set my hand in the presence of two subscribing witnesses.

JOHN G. IFADT.

Witnesses: 4

H. C. LORD, J. yIt. CRAIG. 

